The heavy-hitting artillery piece that weighs 41% less than its predecessor

Countries & Cities · Published 12 October 2026 Swipe more like this →

In short: How do you make a massive 155 mm cannon light enough to be carried by a helicopter? The answer lies in titanium. By swapping traditional steel for aerospace materials, the M777 howitzer redefined mobile warfare, allowing heavy firepower to reach areas previously inaccessible to conventional artillery.

Developed in 1987 as the Ultralight Field Howitzer (UFH) by Vickers' Armaments Division in Barrow-in-Furness, UK, the M777 was designed to solve a specific logistical problem. Its predecessor, the M198 howitzer, weighed approximately 7.154 tons. By utilizing extensive amounts of titanium, engineers reduced the M777's weight to just 4.2 tons. This drastic reduction allows the weapon to be transported by helicopter sling-load or by transport aircraft like the Lockheed C-130 Hercules and C-5 Galaxy.

The manufacturing of the M777 is a cross-continental effort. While BAE Systems manages prime contracts in England, the weapon is largely 'Americanized.' About 70% of its parts are US-built; for instance, the gun barrel (M776) is manufactured at the Watervliet Arsenal in New York. Final integration and testing occur in Hattiesburg, Mississippi. This global supply chain includes subcontractors across California, Indiana, Ohio, and Illinois to produce everything from titanium components to stabilizers.

In combat, the M777's weight advantage translates to operational flexibility. It requires a minimum crew of five (down from nine on older models) and can be fired by as few as three in emergencies. Its precision is further enhanced by digital fire-control systems like Canada’s Digital Gun Management System (DGMS). When paired with the M982 Excalibur GPS-guided munition, it can strike targets up to 40 km away with a circular error probable of just 5 meters, nearly doubling the area covered by a single battery.

The weapon's reliability is high but not infinite; barrels typically require replacement after firing 2,500 shells. Its performance has been proven in diverse theaters, from Afghanistan to Ukraine. In late 2024 and early 2026, BAE announced new production facilities in Sheffield, UK, and Louisville, Kentucky, to meet surging demand for the system following its successful deployment in recent conflicts.

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